Naglers-Panoptics with or without Parracor?

Does using a Parracor improve the imaging of Naglers or Panoptics? Or is the Parracor for non Televue eyepieces? In other words, can the Naglers-Panoptics handle F/4 coma on their own and it's the other brands of eyepieces that benefit most from the Parracor?

The Paracorr helps *all* EPs when you have a "fast" mirror. I consider it a "must have" for any mirror faster than f/5. Others may disagree but I like to have a corrected field of view as far out to the edge as possible and the PC gives me that. YMMV.
Bill